Improvement in spark-arresters



W. T. URIE. Spark -Ariresterl ,919'. Patented Jan.

ATToR `funnel portion.

NUNITEDSTATES PATENT OFFICE. i`

f"WILLIAM r. URIE, orl wninnnnsnune, MIssoUnI.

` `i|MPRoVE|v|ENT |Nfs1PARK -ARRESTERS.'-

Specification forming part of Letters Patent N0.i19`8,919,4dated anuaryl, 1878.; application filed i l. Y .December 8, 1877.. i

State of Missouri, have invented anew'and Improved-Spark-Arrester; and I do hereby declarel that the following isa full, clear, and

exact description of the same, reference `being had 'to the accompanying .drawin gps, forming partof this speciicatiomin which- Figure l is a side view'of my smoke-stack with-a portion thereof insection, showing the construction of the spark-arrester.` Fig. 2 is a sectional View of a lask `illustrating the mode of casting the upper flared section .of the stack.` Fig. '3 isa sectional-view of a iiask illustrating the inode of casting the double lMy invention relates to an himprovement in spark-arresters, designed more especially 'for the smoke-stacks of freight-engines, but applicable also to passenger-engines. It `is "con-` structed with a View to simplicity, durability, and `kcheapness, and operates upon the principle of disintegrating or pulverizing the sparks and unconsumed particles of carbon by .con-I tinued attrition and impact until they are re duced to such a degree of 4iineness as to pass out with the draft, inwhich condition they are harmless so far as danger from re is concerned. In attaining the desired end I dispense with the wire netting, (Which obstructs the draft, andlalso soon wears out,)

and arrange, in the outer circumference of the inside y upper portion of the smoke-stack a curved downwardly-proj ecting annular flange, made continuous with the outer llared case of the stack, which iiange deects the sparks downwardly and to the center, and co-operates with a subjacent centrally-arranged two-part hopper, or, rather, a hopper composed of an upper open funnel and a lower closed funnel, to cause the sparks and particles of carbon to be "first diverted outwardly, then deflected downwardly and centrally against the inner walls of the upper funnel, whence they fall into the lower closed funnel, and are drawn, by a current induced by the force of the next blast, up between the inner walls of the lower funnel and the outer walls of the upperfunnel into the main current, which carries the partially-disintegrated sparks along with the fresh supply around the deflecting-lan ge and down into theupper funnel, for arepetition of the same action,

the sparks and unconsumed particles of carbon being thus carried in circuit round-and round f the walls of the upper funnel as an axis, and i beaten successively against the upper and lower funnel and deiiecting-ilange until they are `thoroughly ycomminuted and made .iine

enough to be carried out by the draft, as hereinafter fully l described.

e In the drawing, A represents the barrel or cylindrical portionof the smoke-stack, and B the enlarged upper or funnel-shaped portion ofthe same.` The upper portion Bof the smoke-stack is provided upon its inside circumference witha curved and downwardlycentric lower funnel, c, `havin g a closed bottom. Y Now', as the blast inthe smoke-stack forces the sparks and unconsumed particles of carbon up, they are diverted by the bottom of the lower funnel outwardly, and pass up divergently until they reach the deflecting flange a` then they are deected downwardly'andto the center against the inner walls of the upper funnel,

and then down into the closed lower funnel.- l blow, instead of accumulating here or being carried off by a pipe, as has been done heretofore, it will be seen that the next blast in the l y outer area ofthe smoke-stack induces between the inner wall of the lower funnel and the outer wall of the upper funnel a current, asindicated by the short arrows, which carries the partiallydisintegrated sparks out from the lower funnel into the main outer` current again. They are then thrown against the deiiecting-flan ge a and downwardly into the two funnels again, thus circulating around the walls of the upper funnel until, by repeated impact, concussion, and attrition, they are reduced to such a degree of pulverization as to be blown out by the draft l vdouble funnel .G-the portion B and the de- Ilecting-lange a being cast in one piece,and

the two funnels b and c of the hopper C being also cast in one piece with and connected by the bridge-arms d. In fastening the 'parts together the double-funneled hopper C is heldin its proper position in the outer portion B by means of thimbles e, and' is securely fastened in such position by rivets fpassing through the thimblesand the walls of the parts B and C, and clinched upon their ends.

For greater symmetry an upper section, D, surrounded by a marginal ring, as shown in dotted lines, may-be attached to the casting B, so as to give thediamo'nd shape. This, however, does not constitute an essential feature'of the invention, and may be dispensed with.

In casting the outer portionB of the smokestack (see Fig. 2) the ask is made in three sections, the pattern in two pieces, g and h, and the parting effected at the lines .r m and y y. In casting the double-funnel portion, Fig. 8, the ask is likewise made in three pieces,

. the pattern in two pieces, z' and j, with a core at lc, and the parting effected at a" and y y.

This construction of spark-arresting smokestacksv embodies great simplicity, economy, and durability, and, while leaving a'free draftexit, effectually prevents the discharge of danboth of these elements are essential to this circulation in bulk-that is to say, the deilectingflange a, made continuous with the side of the tapering case, is necessaryto give a single detinite current carrying` the particles in bulk around the upper edge of the open-bottom funnel, while the construction ofthe two-part hopper,having an upper open funnel and a lower closed-bottom funnel, is necessary to give the turn around the lower wall of the upper funnel, and thus, with the upper flange a, complete the continuous circulation of the particlesin an undivided current to prolong the action,while the sharp turns and repeated impacts eect the pulverization of the particles.

Having thus described my invention, what I 'claim as new is- 1. Athree-part spark-arresting smoke-stack, consisting of a barrel portion, a ilared upper portioncast with a ange, and a central double-funnel hopper cast in one piece, combinedV to operate substantially as described. l

2. A smoke-stack having a downwardly-projecting deiiecting-ilange at its upper inside circumference'7 made continuous with its outer case, combined with a subjacent open-bottom funnel and a second lower closed-bottom funnel, havingpassage-ways between to permit a circulating current to be induced around the Walls of the upper funnel, substantially as and for the purpose described 3. The combination of the outer casing B,

cast with a tlange, a, the double vfunnel-shaped hopper, O, cast in one piece with connecting bridge-arms, the thimbles e, and the rivets j',

substantially as and for the purposede'scribed.`

4. As a 'newarticle of'manufacture, the twopart hopper, 4consisting of an upper open-bottom funnel, b, and a lowerclosed funnel, c, cast in one piece with bridge-arms, substantially as described. e .l

' WM. T. URIE. Witnesses: Y v

Enwn. W. BYRN, SoLoN C. KEMoN. 

